Wrench.



No. 777,025 PATENTED DEC. 6, 1904.

7 H. JAGOBSEN. WRENCH.

AYPLIGATION FILED MAY 25. 1904.

N0 MODEL. 2 SHEETS-SHBBT l.

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PATENTED DEC. 6, 1904.

H. JAGOBSEN.

WRENGH.

APPLIGATION FILED my 25. 1904.

2 SHEETS-BHEBT 2 no MODEL.

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l 'atented. December 6, 1904.

ATENT OFFICE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 777.025, dated December6, 1904.

Application filed May 25, 1904:. Serial No. 209.721. (N0 model.)

1'0 (ft/1Z3 71/72/0717, it ntngl concern Be it known that I, T-TUGOJACOBSEN, a citizen of the United States, residing at Kankakce, in thecounty of Kankakee and State of 1llinois, haveinvented certain new anduseful Improvements in renches, of which the following is aspecification.

This invention relates to improvements in wrenches; and its object is toprovide a cheap and economical structure that will withstand the strainincident to this class of tools.

A further object of the invention is to provide two series of teeth anda slidable holding-dog laterally disposed and movable between the teeth,whereby the movable jaw can be quickly and conveniently located withrelation to the lixed jaw.

Many other objects and advantages will be hereinafter referred to, andbe 1.)articularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective View of myimproved wrench. Fig. 2 is a side elevation. Fig. 3 is a crosssection onthe line 3 3, Fig. 2. Fig. 1 is a similar view on the line 1 4, Fig. 2.Fig. 5 is a perspective view of my improved wrench looking from the sideopposite that shown in Fig. 1. Fig. 6 is a vertical section on the line6 6, Fig. 3. Fig. 7 is a detail perspective view of the locking-dog andits associated parts. Fig. 8 is a section similar to Fig. 3, thelocking-clog being disengaged from its cooperating teeth.

The same numerals refer to like parts in all the figures.

1 represents the stationary jaw; 2 and 3, parallel bars extending fromsaid jaw, and 1 a handle at the opposite ends of the bars. The innerfaces of the bars are provided with teeth 5. and their outer ends havedowel-pins 6, which engage openings in the handle. The handle is formedof two sections 4: 4, each section having grooves to receive the bars 52and 3, and screws 7 secure the section and bars firmly together. Thisconstruction and arrangement of the handle and the bars is strong, andthe parts can be quickly assembled or repaired, which is of vitalimportance in a wrench.

The movable jaw 8 is formed with two slots 9, through which the bars 2and 3 are adapted to freely pass. A transverse slot 10 passes throughthe movable jaw and intersects the slots 9.

A locking-dog 12 works in the slot 10, and it comprises a dog proper,13, and two end heads 14 and 15, held together by a screw 16. On the dog13 are outwardly-extending teeth 17, which engage with the teeth 5 ofthe bars 2 and 3 and hold the movable jaw in a fixed position. The teeth17 only extend partially across the faces of the dog, leaving plainsurfaces 18 18. The heads are slightly larger than the dog and abutagainst the opposite sides of the bars 2 and 3, thus limiting themovement of the lock between the teeth. A flat spring 19 has one endsecured to the side of the movable dog, and its free end bears againstthe end of the head 14 and forces it against the bars and the teeth 17into engagement with the teeth The teeth 17, as well as the teeth 5, areliable to wear and produce a slight lost motion between the dog and thewalls of the transverse slot, and to overcome this action and also toset the dog with relation to its coacting teeth I provide a set-screw20. This screw passes through a threaded opening 21 in the movable jawbetween the bars 2. and 3, and its inner end engages the dog 13 andforces it against the opposite end wall of the slot 10.

In sliding the movable jaw along the bars 2 and 3 the head 15 is pressedin. which disengages the teeth 17 and 5 and brings the plain surfaces 18in alinement with the teeth of the bars when the jaw is free to bemoved. The location of the jaw having been determined, pressure on thehead 15 is relieved, and the spring then forces the dog back again toits normal position d. a, the teeth into engagement with each other. \Vhen the teeth are in register, the movable jaw cannot be moved in eitherdirection, as the thickness of the dog 13 and its teeth 17 are such asto lit to anicety the space between the teeth of the bars 2 and 3. Anydesired movement then of the jaw can only be effected by bringing theplain surfaces 18 in alinement with the teeth 5, as will be readilyunderstood by reference to the drawings. The jaw 8 having been spacedfrom the stationary jaw and then looked as described, obviously there isno possibility of its becoming accidentally disengaged.

What 1 claim as new is 1. A wrench comprising a stationary jaw, a pairof bars extending from the jaw, teeth on the inner faces of the bars, amovable jaw slidably mounted in the bars and formed with a transverseslot, a dog having teeth on opposite faces and on one end and, adjacentplain surfaces at the other end, and a spring which normally holds theteeth of the dog and of the bars into engagement with each other, themovable jaw being slidable on the bars only when the plain surfaces ofthe dog are in alinement with the teeth of the bars, substantially asdescribed.

2. A wrench comprising a stationary jaw, a pair of bars extending fromsaid jaw, teeth on the inner faces of the bars, a movable jaw slidablymounted on the bars, a transverse slot in the movable jaw, a dog mountedin the slot, said dog consisting of a dog proper having teeth at one endwhich engage the teeth of the bars and adjacent plain surfaces, heads onthe ends of the dog, said heads limiting the movement of the dog byabutting against the bars, and a spring which normally holds the teethof the dog and the bars in engagement to fix the movable jaw on thebars,

said movable jaw being movable in either direction only when the plainsurfaces of the dog are in alinement with the teeth of the bars,substantially as described.

3. A wrench having a rigid jaw provided with a shank comprising twoparallel guidebars provided with oppositely-disposed teeth, a slidingjaw on the shank, a sliding locking part carried by and movabletransversely of the jaw, and having teeth to engage those on the shank,and a set-screw carried by the movable jaw which bears against thesliding part and adapted to take up wear between the engaging teeth,substantially as described.

4. A wrench comprising a stationary jaw, a slotted bar projecting fromthe jaw, teeth on the bar, a movable jaw, a dog mounted in the movablejaw, a plain surface at one end of the dog, teeth on the opposite end ofthe dog and in alinement with the plain surface, a spring for normallyholding the teeth in engagement, heads at each end of the dog which areslightly wider than the dog, said heads abutting against the bar andlimiting the movement of the dog in either direction, and a fasteningdevice for securing the heads and dog together, substantially asdescribed.

5. A wrench comprising a stationary jaw, a bar projecting from said jawwhich is formed with an intermediate slot and provided withoppositely-disposed teeth, a movable jaw surrounding the bar and havingan intermediate portion fitting in the slot, a dog fitting in 'a bearingin the intermediate portion of the jaw, said dog having teeth onopposite sides to cooperate with the teeth of the bar, and a springwhich normally holds the teeth of the dog in engagement with the teethof the bar, the movable jaw being slidable on the bar by pushing the doglaterally until the teeth are out of engagement,substantially asdescribed.

In testimony whereof I have signed my name to this specification inpresence of two witnesses.

HUGO J AGOBSEN. Witnesses:

C. O. SAVOIE, HENRY F. RUEL.

